Messenger may mean:

• Bicycle messenger, a bicyclist who transports packages through cities
• Chemical messenger, a molecule used for cellular signalling.
• MESSENGER, a NASA probe to Mercury launched in 2004.
• Messenger (album), the third album by Edwin McCain, released on June 15, 1999.
• Messenger (horse), an English thoroughbred horse that was foaled in 1780, and who was the originating sire of modern-day standardbred horses.
• Messenger (novel), a novel written by Lois Lowry.
• Messenger RNA (mRNA), RNA that carries information from DNA to the ribosome sites of protein synthesis in a cell.

• An instant messaging client or service in general, or specifically one of the following services:
  • AOL Instant Messenger, an ad-supported instant messaging and presence computer program, published by America Online
  • GTalk, an instant messaging client published by Google.
  • Windows Live Messenger, an instant messaging client published by Microsoft.
  • Yahoo! Messenger, an instant messaging client published by Yahoo!.
  • Miranda IM, an opensource instant messaging client released under GNU GPL.
• The Story of Joan of Arc, film
• Muhammad, known as The Messenger in Islam

Messenger | Messenger | Messenger | Messenger | メッセンジャー | Messenger